<template>
  <div class="todo-header">
		<input type="text" placeholder="请输入你的任务名称，按回车键确认" v-model="title" @keyup.enter="add"/>
	</div>
</template>

<script>
import {nanoid} from 'nanoid'
export default {
  name:'Top',
  // props:['addTodo'],
  data() {
    return {
      title:''
    }
  },
  methods: {
    add()
    {
      if(!this.title.trim()) return alert("输入不能为空")
      //将用户的输入包装成为一个todo对象
      const todoObj = {id:nanoid(),title:this.title,done:false}
      // this.addTodo(todoObj)
      this.$emit('addTodo',todoObj)
      //清空输入
      this.title = ""
      console.log("一次测试更新")
    },
  },
}
</script>

<style scoped>
 /*header*/
	.todo-header input {width: 560px;height: 28px;font-size: 14px;
    border: 1px solid #ccc;border-radius: 4px;padding: 4px 7px;}
	.todo-header input:focus {outline: none;border-color: rgba(82, 168, 236, 0.8);
		box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);}
</style>